Aww. Seeing this kind of game brings back my memories. Back when I was a kid I discovered Game Maker and made plenty of games with ...uhm... "minimalist" graphic like yours. I drew with Mspaint. Unlike yours, those games of mine didn't even have audio because I had no clue on how to make them.
I also played your Drone Delivery game game out of curiosity haha. It's quite encouraging to me to see kids making games. Now that I've grown up and I don't have as much time making games. :-(
The game mechanic of yours is good tho. I enjoyed playing it. :-)